Twisting-machine



C. P. WINEMAN.

TWISTING MACHINE.

APPLxcMloN FILED um 3, 1919.

3 SHEETS-SHEET 2. l

Patented May 24, 1921.

C. P. WINEMAN.

-TWISTING MACHINE.

AePLlcATloN FILED 1uLY3.1919.

3 SHEETS-SHEET 3.

Patented May 24, 1921.

Enum/Moz UNITED STATES PATENTv OFFICE.

CHARLES I? .WINEMAN, OF DETROIT, MICHIGAN, ASSIGNOR TO DETROIT TWIST DRILI. COMPANY, 0F DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

TwrsTINef-MACHINE a citizen of the United States of America,

residing at Detroit, in the county of lVayne and State of Michigan, have invented certain new and useful Improvements in tllwisting-lvlachines, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates to twisting machines and particularly to machines for twisting the grooved portions of drill blanks. n One object oi-the invention is to provide aseries ofniembers for non-rotatively engaging dit- Jferent portions oi the blanks and means for driving these members successively through their respective adjacent members. Another object is the provision ot means tor automatically controlling the amount oi' twisting of the blanks. A iurtherobject is the provision ot fluid operated means for holding a portion of the blank from rotation whileanother portion of the blank is bein-g twisted. Other objects of the invention reside in the novel arrangements and combinations cic parts as more fully hereinafter set iorth. v j Y This application is va division oi' kmy former application` Serial No. 220,913 upon machine and method oi making drills or the like, liled March 7, 1918.`

In the drawings:

Figure 1 is a top plan view partially in section oi a construction embodying my invention Fig. 2 is a side elevation thereof partially in section; v f

Figs. 3 and 4 are respectively top plan view and side elevation of the twisting mechanism;

Figs. 5 and 6 are detail views.

, 1, 2 and 3 are rotatable disks or plates each of which is provided with a pair of' diametrically opposite adjustable klingers 4 and 5 which are adapted to engage the groove 6 formed in the drill blank 7. The lingers 4 and 5 are screw threaded through the disks and have the end grooves 8 adapted for engagement with a screw driver whereby the lingers may be adjustedv away from or towardthe center of the disk so as to operate upon drill blanks of various sizes. Each of the disks 1, 2 and 8 are provided with'an adjustable drivingflug 9 secured thereto by means of suitable devices Specification of Letters Patent.

Patented May 24, 1921.

and this application filed July 3,

such as bolts 10 extending through elongated apertures 11 in the driving lugs. These driving lugs have their inner faces notched or serrated 'to engageithe correspondingly formed peripheral faces of the disks. By adjusting or selecting the positions of the driving lugs around the peripheries of their respective disk members the point in the rotation of the twisting mechanism, whereat each disk is brought into operation, may be regulated so as to vary the amount of spiral given to the blank 7. Each driving lug 9, with the exception of the one upon the lower disk, has a depending portion' 12 which extendsdowninto the path of the driving lug on the .next lower disk member whereby motion imparted to the bottom disk member is successively imparted to the next higher disk member whenever the driving lug on the lower disk member has been rotated a sutilcient .distance to strike against or abut the projection 12 in the next higher disk inember.

The upper end or shank portion ot the drill blank is held while the disk members are being. operated to twist the groove portion of the blank. The holding Vmechanism is asV follows: j Slidably mount-ed upon the cover 13 of the stationary fra-me is a pair of gripping jaws 14 which are suitably formed to grip the upper end of shank portion 15 of the drill blank. These gripping jaws are operated by levers 16 which are pivotally connected to the gripping jaws at 17. Corresponding ends18 ot the levers 16 are pivotally connected together by means of the turn-buckle construction 19 whereby the pivots 2O of the levers 16 upon the turnbuckle construction can be adjusted toward or from eachother tocompensatefor rdrills ci various sizes. The opposite ends of the levers 16 are pivotally connected by adj ustable toggle links 21 to plunger 22. Fixcdly secured to one ent j of this plunger is the piston 23 slidably engageable in the cylinder 24. The piston is normallyheld in its inner position within the cylinder 24 by means of the coiled spring 25 between the outer side of the piston and the cuter end of the cylinder 24. Suitable means is provided for admitting` a fluid sucha's compressed air into the cylinder 24 between its inner end 26 and the v piston 23 for forcing the latterk outwardly, which through the toggle and lever mechanism draw the clamping jaws 14 together tightly around the shank portion 15. lVhile the twisting operation is being performed the cylinder 24 is in communication with the fluid source, so that the shank portion of the drill blank is properly held from rotary motion.

While the upper end of the drill blank is thus held stationary the twisting disks are brought into operation through the following driving mechanism: The lower disk is non-rotatably secured to the gear 27 within the stationary frame. This gear is driven from the pinion 28 non-rotatably mounted upon the shaft 29, which latter is rotatably mounted in the stationary frame. This shaft 29 is rotated by suitable means such as the worm pinion 30 which latter is non-rotatably mounted upon the shaft 31 in the frame. The shaft 31 is adapted to be rotated in opposite directions and as shown 32 is a collar splined upon the shaft 31 and provided with suitable clutch jaws 33 and 34 at its opposite ends. 35 and 36 are beveled pinions rotatably mounted in the stationary frame, provided with suitable clutch jaws adapted to be engaged respectively by the clutch jaws 33 and 34 upon the collar 32. These beveled pinions are in constant mesh with the driving beveled pinion 37 so that when the collar 32 is adjusted longitudinally of the shaft 31 to engage either of the beveled pinions 35 or 36 the drive shaft 31 will be rotated and in opposite directions. Sufficient clearance is provided be.- tween the clutch jaws of the collar and the beveled pinions so that when the collar is in intermediate position its jaws willnot engage those of the beveled pinions and consequently the shaft 31 will not be rotated.

To adjust the collar 32 longitudinally of the shaft 31 the lever 38 is provided which is pivotally mounted upon the stationary frame of the mechanism and is provided with suitable means for yieldably holding the lever in its adjusted position as shown. This means comprises the link 39 pivotally connected to the lever arm 40 upon the lever 38. The link 39 slidablyv engages'in the stationary frame and is provided with three notches 41 which are adapted to be engaged in by the spring pressed plunger 42. When the lever 38 is moved in one direction the disk members 1, 2 and 3 will be successively rotated through their respective lower disk members and through the gear 27 pinion 28, shaft 29, worm pinion 30, shaft 31 and one of the beveled pinions. lt is to be understood that whatever number of disk members lare to be employed the same operation takes place by rotating the disk members. The fingers 4 and 5 thereof will twist the groove portion of the drill blank 7 to give it the proper spiral. After the groove portion of the blank has been twisted the lever 38 is then adjusted to position the collar 32 intermediate the beveled pinions 35 and 36 or in neutral position as shown in F ig. 2., The disks 1, 2, and 3 are now free to rotate in the opposite direction so that by pulling the drill blank 7 upwardly after the gripping jaws have been released the drill blank can be readily withdrawn from the disks. The lever 38 can be adjusted to move the collar 32 into engagement with the beveled pinion not previously engaged, thereby reversing the irection of rotation of the shaft 31 and the other Vdriving mechanismvto rotate disk members 1, 2 and 3 back to their original positions when they are ready to receive the grooved portion of another drill blank preparatory to twisting the same.

For the purpose of automatically controlling the rotation of the disk members 1, 2 and 3 and thereby controlling the twisting of the drill blank the following construction is provided: 43 is a rotating plate carrying a throw-in lug 44 and a throw-out lug 45. These lugs are adj ustably secured to the plate by bolts 46 extending through slots 47 concentric with the plate. The purpose of the bolt` and slot connection is topermit these throw-in and throw out lugs to be set at variouspoints about the periphery of thc plate so as to increase or decrease the amount of spiral given to thefluted portion of the drill blank. 48 is a depending pin upon thel horizontal bar 49 extending 'above the plate 43 and pivotally connected to they j lever 38. The throw-in lug 44 has outer cam-shaped flange 50 which is adapted to engage the pin 48 thereby drawing the lever 38 inwardly toward the plate 43 by means of bar 49. The lug 45 has aY cam surface which is adapted to engage the pin to move the vlever 38 in the opposite direction. The plate 43 is driven from the shaft 31 by means of suitable gears 51 thereby driving the plate in time relation to the disk memy bers 1, 2 and 3. j

In operation and when the disk members 1, 2 and 3 are being rotated in reverse direction and the plate 43 is being` rotated in t-he direction as indicated by the arrow in Fig. 1 the cainmed flange 50 of the`throw-in lug 44 will engage the pin 48 to move the same inwardly toward the plateV vthereby moving its lower end so that the collar 32 will'engage the bevel pinion 35, thereby driving the shaft 31, disk members 1, 2 and 3 and gearing 51 in a direction such as tocorrectly twist the luted portion of the drill. This operation continues until the cam surface of the throw-out lug 45 engages the pin portion 48 to force the lever 38 in the reverse direction and to neutral position as shown in Fig.2, when the mechanism is no longer rotated. Thecam surface of the throw-out lug 45 does not eX- tend outwardly from the `periphery of the plate L3 a distance as great as does the camsurfaoe of the flange of the throw-in lug 44. In reversing the direction of rotation of the parts the lever 38 is manually adjusted to engage the collar 32 into driving relation with the pinion 36 and after the disk members have been rotated to their original positions the lever 38 is moved to neutral position.

Vhat I claim as my invention is:

1. In a machine for forming drills or the like, the combination with a plurality of members for non-rotatively engaging different portions of the blank, of means for successively rotating said members through their respective adjacent members, and means for automatically controlling the rotation of said members.

2. In a machine for forming drills or the like provided with grooves, the combination with a plurality of rotating disks having groove engaging members, of mechanism for driving each of said disks successively through the adjacent disk, and means for automatically throwing the mechanism out of operation at a predetermined time.

3.- In a machine for forming drills or the like provided with grooves, the combination with a plurality of rotatable disks having adjustable members for engaging grooves in the blank, of means for holding one end of the blank stationary, means for rotating the disks through a predetermined angle to Jforni the other end of the blank into spiral form, and means for automatically controlling said rotating means.

4. In a machine for forming drills or theV like provided withl grooves, the combination with a plurality of rotatable disks having members for engaging grooves in the blank, of means for holding one end of the blank stationary, means for rotating the disks to form the other end of the blank into spiral form, and automatic control mechanism governing the starting and stopping o the twisting operation.

5. In a twisting machine, the combination with a plurality of rotatable disks'for nonrotatively engaging dilferent portions of a blank to be twisted, of means for rotating said disks, means engageable with a portion of said blank adjacent to one of said disks for holding said portion stationary, fluid operated means for actuating said holding means and means independent of said fluidoperated means for varying the movement of said holding means.

7. In a machine for forming drills or the like, the combination with a plurality of rotating disks having serrated peripheries, of driving lugs adjustably secured to the peripheries of said disks, said lugseach having `an inner serrated surface for coperating with the serrations upon its respective disk and said lugs each having an elongated slot there-through, and a bolt extending through said slot and secured to said disk.

8.oIn a machine Jfor twisting drills, the combination of a series of rotatable twisting devices, lost-motion driving connections between said devices, mechanism for driving the devices, and means for automatically stopping said mechanism when the stock has been twisted. y

9. In a machine for twisting drills, the combination of a series of rotatable twisting devices, means for successively rotating said devices, and means for automatically` stopping said rotating means at a predetermined time, said automatic stopping means being adjustable to vary its time of operation.

In testimon whereof I affix my si nature.

HARLES P. WINE IAN. 

